Please use tidal harmonic predictions with a sensible margin of safety. The effect of air pressure on tidal height can be substantial. Tide tables assume a standard pressure of 1013 hectoPascal (hPa). One hPa, or millibar, variation from that will change the sea level by one centimetre. Mean sea levels may also be raised or lowered by strong winds depending upon the topographical features of the area.

(Manual calculation) (Portsmouth)

Small tidal stream inaccuracies can develop when advancing beyond HW Portsmouth +6. Because of this we only enable today's tidal stream chartlets to advance 24 hours.
Future tidal planning is best accomplished by using Elephant Boatyard's future tides predictor below.

The above image represents the current tidal streams offshore of this haven. Streams attaining three knots and above are highlighted by red arrows . All times are in local time with red text indicating springs, blue indicating neaps and gray between tidal events. Click [+] to advance the estimate by an hour and click [-] to step back.
Future tidal planning is best accomplished by using Elephant Boatyard's future tides predictor below.

During Springs High Water, Warsash at the head of the river, is 10 minutes after HW Southampton and Low Water is the same as LW Southampton. During Neaps High Water Warsash is 20 minutes after High Water Southampton and Low Water is 10 minutes afterwards.

Double High Water occurs at or near Springs and there is a stand, which can last as long as two hours, at other times. Estimates presented are for the first High Water during Springs or the middle of the stand outside of this.

Helmsmen should note the double high tide or stand means the ebb tide has to complete its cycle in 3-4 hours instead of the usual 5 + hours. This means that the rate of the ebb will be significantly greater than the preceding flood tide. This rate could also be increased by land water, after heavy rain, flowing in the river. Be very careful moving into complicated berths on the ebb and it is best to entirely avoid berthing manoeuvres on the first flush of the ebb especially so during Springs.

Sorry, our local future 'Tide Predictor' is currently not available for this location. Please find the BBC seven-day local tidal forecast below for your convenience. BBC tides are displayed in UTC (GMT). When the UK is observing British Summer Time (BST) you should add one hour to the times displayed by the BBC.

Feel free to use our calendar, below, to predict 'Future Tidal Streams' as normal. These are displayed in local time and need no adjustment.

The above wind speeds are expressed in the Beaufort scale. Red indicates strong winds of 6 or higher.

Headline: Chilly and sunny to start, cloudy with showers this afternoon.

Today: Dry and somewhat chilly to start. There will be sunny spells at first, but cloud will increase through the morning, with some showery rain possible in the afternoon. Maximum Temperature 20C.

Tonight: Showers lingering in the east of the region this evening, but with some sunny spells possible in the west. Becoming dry overnight, but often cloudy. Minimum Temperature 9C.

Monday: Monday should be a dry day with some sunny spells and light winds. Becoming chilly overnight. Maximum Temperature 20C.

Outlook for Tuesday to Thursday: A chilly start Tuesday, but dry with some sunny spells. Clouding over on Wednesday with outbreaks of rain later, perhaps heavy. Further possibly heavy rain Thursday with strengthening winds.

Click [+] to advance by twelve hours and click [-] to step back. The forecasted time is presented in the top left hand corner of the pressure chart. Click the image to display it in a full window.

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If it is a listed location, or there is a listed location nearby, simply select the county and haven to determine the search origin. Alternatively if you have a chart, plotter or GPS input the position in decimal degrees. Finally if you are there right now your computer may be able to automatically locate its current position via auto-locate.

There are three ways to get started; base your search from one of our listed locations, input a position, or let us try to automatically detect your current location.

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The described position in step one will centre a search and the range sets the radius of a circular search area. All suitable targets, in all directions, within the direct point-to-point or aerial transit path of the range will be presented. Because the search is based on this charted distance in most cases the actual sailing passages will require extra mileage to circumvent navigational obstacles.

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Refine your search to target specific shelter, location type or facilities. Alternatively you can press 'Go' now to find all the locations within the selected range.

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Specific shelter

Describe the sectors you want sheltered, where you expect the wind to blow from. You may manually input each by checking the compass points or auto-fill by checking the required days on this location's five day weather forecast, more information.

You may also use a combination of both manual and forecast auto-fill to add additional sectors. Please note that the forecast auto-fill adds one compass point on either side of the forecast to allow for variability. The grey segments in the compass rose provide a visual summary of the shelter construct.

Please note that forecast auto-fill adds one compass point on either side of the forecast to allow for variability.

Level of protection

You may refine your search to specify a minimum level of protection, more information.

Quality of shelter is characterised from one to five stars and are described below. All levels are selected by default and you can set what is appropriate by checking the minimum star rating level. If you do not set a minimum level all havens that cover the requested quadrants will be presented irrespective of the quality of the shelter provided.

Specifying the minimum level of protection is important as this may vary significantly depending upon what it is needed for and the prevailing conditions. For instance, if conditions are moderate and it is simply needed for a lunch stop, most all locations from one star will be suitable. When looking for a location to stay overnight in comfort it would be more appropriate to select a three star minimum. Or when seeking shelter in rough conditions a minimum of four stars would be best. All of these depend upon what you are personally comfortable with, plus the capabilities of the vessel and crew.

Check the minimumlevel of protection

Complete protection; all-round shelter in all reasonable conditions.

Good; assured night's sleep except from specific quarters.

Tolerable; in suitable conditions a vessel may be left unwatched and an overnight stay.

Exposed; unattended vessels should be watched from the shore and a comfortable overnight stay is unlikely.

Stay-aboard; lunch stop or tide-wait exposed or tenacious holding location where a vessel should not be left unattended.

Ease of access

You may refine your search to the set how easy seaward access is to the resources, more information.

Approaches to the shelter are also characterised from one to five stars. All access levels are selected by default and the minimum level of access complexity may be chosen by clicking the appropriate minimum star rating.

This minimum level of access complexity may vary significantly depending upon the time available, the vessel and skill levels of the crew plus the prevailing conditions. For instance, if conditions are moderate, plus time and experience are plentiful, the one star minimum could be the most suitable option for the adventurous sailor. If conditions are more developed, but the visibility is good, a three star minimum could be the best fit. Or when seeking shelter in heavy weather conditions a four stars access minimum may be best. All of these depend upon what you are personally comfortable with, plus the capabilities of the vessel and crew.

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Safe access; all reasonable conditions.

Straightforward; when unaffected by weather from difficult quadrants or tidal consideration, no overly complex dangers.

Coastguard should only be used for distress and urgency calls as follows:

• VHF Channel 16 call sign [Solent Coastguard]

• Alternatively, where a good phone signal exists, dial 999 and ask for the coastguard.

• If at sea, use the Global Maritime Distress and Safety System (GMDSS) systems to make a distress or urgency alert.

The National Maritime Operations Centre (NMOC) based Fareham handles all operations in the area from Sussex, Hampshire, Isle of Wight, Dorset and Devon. They also assist other authorities such as the Police, Fire and Ambulance with their specialist expertise. The centre is manned 24x7 and has helicopters, based at rescue bases in Portland or Lee-On-Solent, at their disposal. Ch.67 that can be used for routine communications and the National Maritime Operations Centre can be contacted directly on +44 23 8032 9486 for administrative enquiries only.

Phone 999 when it is a Police emergency, such as when a crime is in progress, someone suspected of a crime is nearby, when there is a danger to life or when violence is being used or threatened. Phone 101, the police non-emergency number, when it's less urgent than a 999 call.

Useful Local Contacts

Other useful contacts

Harbour Master P: +44 1489 576387 VHF Ch. 68 call sign [Hamble Harbour Radio]. The office in Warsash is open 8.30 am to 5 pm daily. If office unavailable Hamble Patrol operates in the summer, 1 April to 30 September, from 6.30 am to 10 pm and in winter, 1 October to 30 April, 8.30 am to 5 pm. The patrol is available on M: +44 7718 146380 or +44 7718 146381.

Please note eOceanic makes no guarantee of the validity of this information. Whilst every effort has been made to use valid source data and ensure calculations are correct, no warranty is made. All tidal predictions are approximations and differences used to calculate times and heights at secondary ports are based on stated averages that reduce precision. This information is provided as a guide only and is not to be used for navigation. For navigation please refer to published tidal tables. Actual height and time of tides are affected by barometric pressure and other weather effects. Any data provided on this page is entirely used at your own risk and you must read our legal page if you view data on this site.